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Abstract:
An unusual case of intrauterine hydrosalpinx is reported. The tube was greatly dilated and formed a large intramyometrial cyst. It was thought to be a leiomyoma with cystic degeneration but was shown to be a true cyst lined by tube-type epithelium. Because it simulated a neoplasm owing to its large size, the term " endosalpingoma " is proposed. The differential diagnosis with myometrial cysts is discussed.